HDMI> The early issues had to do with loosing sync and having to reboot the PJ, etc. I don't have those issues---was fixed with a FW update that my RS57 already has. BUT, the hdmi sync delay is LONG and annoying. It can take 5-10 seconds to sync, and this will happen anytime resolution/refresh rate is changed. So on blu rays for example, it happens multiple times as the menu screens, etc. are different refresh rates than the movie. And most of the time the movie studio header (MGM., etc) is sometimes even missed as the sync can take that long. So you will hear opening music intro's but no picture for a few more seconds, etc. Apparently JVC's have never been speedy in that regard.
Also annoying is when playing with settings, like different picture modes, there's also a long delay---so impossible to compare different modes instantly----there's seconds of black screen. For minor changes, it's hard to notice the better picture mode when you have that long of a delay, etc.
My HC3800 didn't have any of these issues at all.
I'm coming from a Mits HC3800. I was expecting big improvements in Black levels and shadow detail----and essentially I got that, but perhaps not as much as I expected. Was almost expecting 'Inky blacks' that so many seem to mention, that there could not really be any improvements beyond a RS57----I think that might be a bit hyperbolic. The only time I've seen real inky blacks was on a OLED display. So black level is much improved over the HC3800, shadow detail doesn't seem much better, but I seem to be dialing that in. The lamp had 560 hrs or so on it and it seemed like I had a good amount of black crush in most of the picture modes, like Natural and especially THX mode, which is supposed to be pretty bang on OTB according to everyone. But, I've also read about Gamma drift after a few hundred hrs and perhaps that's what I'm seeing. Trying lower gamma's----2.1, 2.0, etc, seemed to help a lot. So perhaps that is the 'gamma drift'. I'm thinking of popping the new lamp in to see if the gamma snaps back into place (so I know what it looks like), though I'm assuming the gamma drift is from the lamp and not something else (like the Lcos panels---which would be crazy if so).
I don't really see much improvement on bright scenes---which I kinda expected. Even though in the HC3800 thread there's a few posters who upgraded to a Sony 40ES or something and saw huge improvements across the board, including bright scenes. We went back in forth a bit on this and I think the reason they saw big pop differences in bright scenes with the Sony vs HC3800 is because they had too big of a screen for the HC3800 and they popped in place a PJ (40ES, etc) that had twice the lumens, so of course it popped better!
I have a very small screen---80" diagonal 16:9 in a very small room. Sit about 9 ft back. Also, it's a .9 gray screen. This was a good match for the HC3800---trying to get a little bit more better blacks from it. I was expecting the RS57 to be a light cannon on this screen and that I'd need to clamp the manual iris all the way down, but not at all. I've settled on -9 manual and auto 2 on the dynamic. Perhaps there's more than 560 hrs on the lamp, I dunno. Again, I might try the new lamp to see.
I am having issues with squaring the PJ to the screen. It seems I can't really find the 'lens center' on the horizontal plain. Using the Lens Center function doesn't seem to always bring it to the same 'center' spot, and using all the vertical shift to eliminate horizontal shift also doesn't seem to be repeatable to the same spot. It seems that once you get the to limit stop on lens shift, it kinda loses it's positioning a little bet. Though using lens memory function seems to be repeatable as it doesn't normally go to the limits of lens shift.
It is quite a bit quieter than my HC3800, though the lens door opening/closing noise is insanely loud! Sounds like you're opening the hanger the space shuttle is housed in! You'll see!
Convergence wasn't perfect, but seems ok. I'll try to examine and see if I can improve it, but my first attempts failed miserably. You lose 1:1 pixel mapping when you try to adjust pixel convergence, and it made it worse when I tried to adjust. I'll revisit later. Focus uniformity seems to be a bit better than my HC3800 (probably due to a much better lens), but the pic doesn't 'appear' to be any sharper. Though it doesn't appear softer---which I was afraid of (DLP to 3 chip). I'm guessing a high end single chip DLP with expensive lens would be sharper.
Even though I knew the RS57 was a lot larger and heavier than my HC3800, in real life it was way more than I expected. It weighs 33 lbs (compared to 8 lbs HC3800), but for whatever reason feels way heavier than that! It's gonna be a project to ceiling mount it for sure. My original mounting set up for my 8 lb HC3800 ain't gonna cut it. I gotta reconfigure for 50 lbs (PJ + mount weight, etc.).
So overall I'm happy at the $2k purchase point, but super glad I didn't pay the $7k or so many did when new. That's a for sure point for me.